For example:
ALTER TABLE customer
ADD CONSTRAINT pk_customer
PRIMARY KEY (c_w_id, c_d_id, c_id);
But the "datagen -t mysql" generate data include null values . They can not be created to be primary key. And the c_w_id, c_d_id, c_id has the same values . They are not unique. They also can not be created to primary key.
For example:
ALTER TABLE customer
ADD CONSTRAINT pk_customer
PRIMARY KEY (c_w_id, c_d_id, c_id);
But the "datagen -t mysql" generate data include null values . They can not be created to be primary key. And the c_w_id, c_d_id, c_id has the same values . They are not unique. They also can not be created to primary key.